Perceptual computing uses special glasses, similar to Google Glass or MIT's Magic Glass, to see the output.

If the elements of E(G) are ordered pairs, G is called a(n) ____ graph.

A. undirected B. directed C. weighted D. spanning

In the accompanying figure, item D is used for which of the following?

A. Display a list of open folios B. Display a list of folio templates C. Display a list of local folios D. Display a list of available folios